An Orange County Sheriff's deputy estimated 150 shots were fired in the final gunfight between law enforcement and Pulse nightclub gunman Omar Mateen.

The revelation was included in about 60 new pages of documents released by the Orange County Sheriff's Office on Friday, which offer more details about what law enforcement saw and heard when they responded to the shooting June 12 that left 49 dead and more than 50 others injured.

As Deputy Jason Fenderson entered the club, he was told to find anyone "who may have a chance of survival" and get them out, he wrote in his incident report.

He wrote that he tried to spot the survivors, but it was difficult.

"The floor was covered in blood and it was difficult to tell" who was who, he wrote.

Fenderson started checking patrons for signs of life. He found one person with a faint pulse and called other officers to get the person out.

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The report said OPD policy and procedures were followed, but the protective plan “was not written with an attack of this magnitude in mind.”

The report said OPD policy and procedures were followed, but the protective plan “was not written with an attack of this magnitude in mind.”

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The report said OPD policy and procedures were followed, but the protective plan “was not written with an attack of this magnitude in mind.”

The report said OPD policy and procedures were followed, but the protective plan “was not written with an attack of this magnitude in mind.”

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The owner of Pulse nightclub, Barbara Poma spoke at a ceremony honoring the 49 people lost in Pulse massacre.

The owner of Pulse nightclub, Barbara Poma spoke at a ceremony honoring the 49 people lost in Pulse massacre.

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Barbara Poma, founder of the onePULSE Foundation and former owner of the Pulse nightclub, reflects on the second anniversary of the Pulse massacre, Monday, June 11, 2018. (Joe Burbank/Orlando Sentinel)

Barbara Poma, founder of the onePULSE Foundation and former owner of the Pulse nightclub, reflects on the second anniversary of the Pulse massacre, Monday, June 11, 2018. (Joe Burbank/Orlando Sentinel)

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Pulse related events around Orlando are scheduled Monday and Tuesday to honor the victims of the mass shooting on June 12, 2016.

Pulse related events around Orlando are scheduled Monday and Tuesday to honor the victims of the mass shooting on June 12, 2016.

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Two years after a gunman killed 49 people at Orlando's Pulse nightclub, the city has more metal detectors, panic buttons, active-shooter drills, trauma counseling and grief-stricken parents and partners than it did in 2016. But for some, it also has more compassion and progress and purpose.

Two years after a gunman killed 49 people at Orlando's Pulse nightclub, the city has more metal detectors, panic buttons, active-shooter drills, trauma counseling and grief-stricken parents and partners than it did in 2016. But for some, it also has more compassion and progress and purpose.

Deputy Daniel Payne also went inside to help the injured.

"As responders entered the building, we aided the wounded having to ignore the obviously dead as to preserve what life we could," he wrote.

On the dance floor, Payne saw "at least two polymer type rifle magazines on the floor," as well as spent rifle shell casings, he wrote.

As he checked bodies, Deputy Andrew Stephens described the chaos inside as first responders were directed to the many areas of the club victims were calling from.

"Dispatch was constantly updating us with 911 calls advising they were in different locations of the club and were victims of the shooting," he said. "Dispatch also advised that the shooter called 911 announcing his allegiance to ISIS."

Sgt. Keith Vidler went in through the front door and immediately saw people with gunshot wounds on the floor. He needed to know who could still be saved.

"There were so many lifeless bodies lying throughout the club, that it was impossible to physically check everyone with the threat of the suspect having a bomb and an assault rifle that would penetrate the bathroom walls into the area we were assisting victims," he wrote.

Hours later, Deputy Robert Kelly described the chaos when law enforcement breached the building.

"I maintained this position while OPD SWAT used an explosive device on the west wall to the club, which was out of my sightline," he wrote in a report. "A minute or so later I observed approximately 10 patrons being led toward the south and behind the Dunkin Donuts. I then heard approximately 150 rounds fired from the west side of the club."

"I could not see the shooting inside the building, nor do I know how many shots were fired. I immediately saw a volley of shots [return fire] from the SWAT members that lasted for several seconds," he wrote. "We were notified over the radio that the shooter was down."

David Harris, Gal Tziperman Lotan and Caitlin Doornbos contributed to this report.